subwoofer buzz - how to eliminate it


MartinLogan Dynamo 700w 

At low frequencies, it vibrates, like it wants to fall apart. It does have a rubber feet, sitting on a hardwood floor, what could prevent it? Isolation feet? More rubber? Also it's facing the floor but can be turned sideways, would that help?

grislybutter

all you need is the Auralex.  the sub, including the feet, will sit on top of the platform.  simple stuff.  it keeps the sub from radiating onto the floor, which brings all kinds of issues, like rattling floor boards, etc.  it works very well for me, i have 2 JL Audio subs that sit on the platforms.

@grislybutter I previously suggested both the Nobsound springs and the Auralex Subdude in part because the Nobsound feet have free 30-day returns, so you can decide if any additional isolation benefit is worth it to you. They isolate in a different way than the foam on the Subdude, so it will have additive benefits; neither solution being perfect by itself. They are very effective and inexpensive. The point made above about using three feet vs four only applies to spikes, not spring loaded feet. Lastly, the Nobsounds perform best with a foam earplug stuffed inside of some of the springs for a damping factor. Best of luck

thanks @gladmo I wish there was one platform for all these, there probably is, for big $$$

My only issue with the springs is the height/look but if it works, fine.

@grislybutter Sure, happy to try to help. The Nobsound are going to be more classy looking than the Auralex platform. They are brushed aluminum with some shine to them, and when the springs are compressed about halfway as they should be (no more than halfway), I think they look really nice. And with the inserted black foam earplug mod, you can expect them to perform in vibration isolation better than the more expensive foam-based platform.

This may be a long shot but check the mounting screws for the drives I did this for my two powered subs and was surprised how many were lose Hey I do the same for my tower speakers